Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 2021.1
  • 12/04/2020
  • Public Content
Contents

?tpttf

Copies a triangular matrix from the standard packed format (TP) to the rectangular full packed format (TF).

Syntax

lapack_int
LAPACKE_stpttf
(
int
matrix_layout
,
char
transr
,
char
uplo
,
lapack_int
n
,
const
float
*
ap
,
float
*
arf
);
lapack_int
LAPACKE_dtpttf
(
int
matrix_layout
,
char
transr
,
char
uplo
,
lapack_int
n
,
const
double
*
ap
,
double
*
arf
);
lapack_int
LAPACKE_ctpttf
(
int
matrix_layout
,
char
transr
,
char
uplo
,
lapack_int
n
,
const
lapack_complex_float
*
ap
,
lapack_complex_float
*
arf
);
lapack_int
LAPACKE_ztpttf
(
int
matrix_layout
,
char
transr
,
char
uplo
,
lapack_int
n
,
const
lapack_complex_double
*
ap
,
lapack_complex_double
*
arf
);
Include Files
  • mkl.h
Description
The routine copies a triangular matrix
A
 from the standard packed format to the Rectangular Full Packed (RFP) format. For the description of the RFP format, see Matrix Storage Schemes.
Input Parameters
matrix_layout
Specifies whether matrix storage layout is row major (
LAPACK_ROW_MAJOR
) or column major (
LAPACK_COL_MAJOR
).
transr
= 'N':
arf
 must be in the Normal format,
= 'T':
arf
 must be in the Transpose format (for
stpttf
 and
dtpttf
),
= 'C':
arf
 must be in the Conjugate-transpose format (for
ctpttf
 and
ztpttf
).
uplo
Specifies whether
A
 is upper or lower triangular:
= 'U': A is upper triangular,
= 'L': A is lower triangular.
n
The order of the matrix
A
.
n
≥
 0
.
ap
Array, size at least max (1,
n
*(
n
+1)/2).
On entry, the upper or lower triangular matrix
A
, packed in a linear array.
See Matrix Storage Schemes for more information.
Output Parameters
arf
Array, size at least
max
(1,
n
*(
n
+1)/2).
On exit, the upper or lower triangular matrix
A
 stored in the RFP format.
Return Values
This function returns a value
info
.
If
info
 = 0
, the execution is successful.
< 0: if
info
 = -
i
, the
i
-th parameter had an illegal value.
If
info
 = -1011
, memory allocation error occurred.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.